Improvement in steam-boilers



` places.

UNITED STATES PATENT EEICE.

THOMAS G. BOONE, OF BROOKLYN, NE-V YORK.

IMPROVEMENT IN STEAM-BOILERS.

Specification forming part of Letters Patent No. 12,893, dated May 22, 1855.

To @ZZ whom t may concern:

Be it known that I, THOMAS G. BOONE, of

Brooklyn, in the county of Kings and State Figure l is a vertical section of a boiler having` my improvements applied, the section being taken transversely to the iire-places. Fig. 2 is another vertical section of the same, taken longitudinally through one of the iire- Fig. 3 is a horizontal section of the same, taken a short distance above the grates.

Similar letters of reference indicate corre-` sponding parts in each of the several figures.

This invention consists in a novel arrangement of vertical water-tubes, fire-surfaces, water-spaces, and non-conducting lining for givinga proper circulation of water, making a safe, economical, and durable boiler.

To enable those skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

C represents the lower, and D the upper, chamber of the boiler,` C being made cylindrical and D slightly conical, as either of those forms is well adapted for strength. Square or other forms may, however, be used il in any instance it may be thought desirable.

E is the lower tube-sheet, which forms the top ot' the lower water-chamber, and F is the upper tube-sheet, which forms the bottom of the upper water-chamber.

G G G G G are five rows of tubes of any length that may be considered most suitable, having their ends iitted in the most approved manner into the tube-sheetsE and F andforming communications between the upper and lower waterchambers. The tubes of each row arenearly close together, and the number shown form four fire-chambers H H H H, to which the tubes form side walls or partitions.

I I are two rows of return or descending tubes, also forming communications between the lower and upper water-chambers. These are sheltered from the action of the fire by the rows G G, outside which they are placed, and are further protected by being packed around so as to till the spaces between themwith fire-clay and sand or with any suitable poor conducting material. i They may be car- `ried outside the boiler, instead of inside.

stices around the tubes G G G G GV below the grates may be partially filled with nonconducting substance with or without apertures for the admission of air and passing it in a heated state to aid the combustion of gases above the solid fuel in -the fire-chambers.

L L are ilues leading from the back part of the nre-chambers through the tube-sheet F and bent to run horizontally through the chamber D below the water-line. These iiues may all discharge into a smoke-box or uptake in front or at the side of the boiler, or may have upright tubes p p leading from them through the top of the boiler, as shown, in which case they terminate in the front or side of the boiler and are intended to be furnished with movable Stoppers, which can be taken out to clean them.l The upright tubes serve as stays'to the top of the boiler. Additional stays N N are also provided.

P P are upright plates placed between the upper mouths of the tubes G l and I I for the purpose of keeping a solid body of water over each set of descending tubes I undisturbed by the ebullition.

Q Q are spray-arresters for the purpose of keeping the steam free from water.

Y is the steam-pipe.

When the tire is ignited on the grates K K K K, the radiant heat of the ignited fuel is conducted tothe water through the tubes G G G G G, while that portion of heat not so taken off either remains to support combustion or is carried and applied to the upper part of the tubes and to the tube-sheet F. The upper parts of the tu bes are well adapted from the extensive surface therein presented to take from the :tlame or ignited gases and heated air and make effective in generating 2 meer? steam the heat of that part of the combustion in addition to that taken direct from the fuel itself through the lower part of the tubes. The heated air and gases are made still further effective by the employment of the tubes LL and p p, which present a considerable iinmersed surface. The ascent of steam and water in the tubes G G G G G causes a downward current in I to supply the displacement from the chamber C, which after ebullition commences is soon heated by water from the lower end of the tubes I I. By this arrangement the tubes G G G G G are plentifully supplied with Water while exposed to the most intense action of the heat radiated by the fuel.

Vliat I claim as my invention, and desire to secure by Letters Patent, is-

The arrangement of the vertical watertubes, lire-surfaces, upper and lower Water.- spaces, and non-conducting lining for giving circulation, substantially as herein set forth.

THOMAS G. BOONE.

Witnesses:

S. H. WALES, O. D. MUNN. 

